Can you place a color lens in front of a white LED and get effective emergency warning like traditional lighting technologies?
No. While you can place a color lens in front of strobe and halogen light sources, white LEDs do not perform the same way. Strobe and halogen light sources produce a broad spectrum of light. A portion of that spectrum filters through the color lens to deliver red, blue, amber and even green lighting. White LEDs generate a much narrower spectrum of light. Only a small, ineffective portion of that spectrum will pass through the color filter. However, monochromatic LEDs (e.g. red, blue, amber) work extremely well when matched with the same color lens — transmitting over 86% of their original light output.
